Use IP to determine the PHP code of the city in which the user is accessing

function Detect_city ($IP) { $default = ' UNKNOWN '; $curlopt _useragent = ' mozilla/5.0 (Windows; U Windows NT 5.1; En-us; rv:1.9.2) gecko/20100115 firefox/3.6 (. NET CLR 3.5.30729) '; $url = ' http://ipinfodb.com/ip_locator.php?ip= '. UrlEncode ($IP); $ch = Curl_init (); $curl _opt = Array ( Curlopt_followlocation = 1, Curlopt_header = 0, Curlopt_returntransfer = 1, Curlopt_useragent = $curlopt _useragent, Curlopt_url = $url, Curlopt_timeout = 1, Curlopt_referer = '/http '. $_server[' Http_host '), ); Curl_setopt_array ($ch, $curl _opt); $content = curl_exec ($ch); if (!is_null ($curl _info)) { $curl _info = Curl_getinfo ($ch); } Curl_close ($ch); if (Preg_match (' { City: ([^<]*) }i ', $content, $regs)) { $city = $regs [1]; } if (Preg_match (' { State/province: ([^<]*) }i ', $content, $regs)) { $state = $regs [1]; } if ($city! = "&& $state! =") { $location = $city. ', ' . $state; return $location; }else{ return $default; } } Copy Code Usage: $ip = $_server[' remote_addr '); $city = detect_city ($IP); Echo $city; ?> Copy Code

Yes, in which city?

